<template>
	<div class="list" ref="wrapper">
		<div>
			<div class="area">
				<div class="title border-topbottom">当前城市</div>
				<div class="button-list">
					<div class="button-wrapper">
						<div class="button">{{this.currentCity}}</div>
					</div>
				</div>
			</div>
			<div class="area">
				<div class="title border-topbottom">热门城市</div>
				<div class="button-list">
					<div class="button-wrapper" v-for="item of hot" :key="item.id" @click="handleCityClick(item.name)">
						<div class="button">{{item.name}}</div>
					</div>
				</div>
			</div>
			
			<div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
				<div class="title border-topbottom">{{key}}</div>
				<div class="item-list">
					<div class="item border-topbottom" v-for="innerItem of item" :key="innerItem.id" @click="handleCityClick(innerItem.name)">{{innerItem.name}}</div>
				</div>
			</div>
		</div>
	</div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState,mapMutations } from 'vuex'
export default {
	name: 'CityList',
	props: {
		hot:Array,
		cities: Object,
		letter: String
	},
	computed: {
		...mapState ({
			currentCity: 'city'
		})
	},
	methods: {
		handleCityClick (city) {
			this.changeCity(city)
			this.$router.push('/')
		},
		...mapMutations(['changeCity'])
	},
	watch: {
		letter () {
			if (this.letter) {
				const element = this.$refs[this.letter][0]
				this.scroll.scrollToElement(element)
			}
		}
	},
	mounted () {
		this.scroll = new Bscroll(this.$refs.wrapper)
	},
}	
</script>

<style lang="stylus" scoped>
@import '~styles/varibles.styl'
.border-topbottom
	&:before
		border-color: #ccc
	&:after
		border-color: #ccc
.border-bottom
	&:before
		border-color: #ccc
.list
	overflow: hidden
	position: absolute
	top: 1.58rem
	left: 0
	right: 0
	bottom: 0
	.title
		line-height: .54rem
		background: #eee
		padding-left: .2rem
		color: #666
		font-size: .26rem
	.button-list
		overflow: hidden
		padding: .1rem .6rem .1rem .1rem
		.button-wrapper
			float: left
			width: 33.33%
			.button
				margin: .1rem
				padding: .1rem 0
				text-align: center
				border: .02rem solid #ccc
				border-radius: .06rem
	.item-list
		.item
			line-height: .76rem
			color: #666
			padding-left: .2rem
</style>